Measurement of the analyzing power AN in pp elastic scattering in the CNI region with a polarized atomic hydrogen gas jet target

被引：64

作者：

Okada, H.

Alekseev, I. G.

Bravar, A. ^{[1
]}

Bunce, G.

Dhawan, S.

Gill, R.

Haeberli, W.

Jinnouchi, O.

Khodinov, A.

Makdisi, Y.

Nass, A.

Saito, N.

Stephenson, E. J.

Svirida, D. N.

Wise, T.

Zelenski, A.

机构：

[1] Brookhaven Natl Lab, Upton, NY 11973 USA

[2] Brookhaven Natl Lab, RIKEN, Res Ctr, Upton, NY 11973 USA

[3] Inst Theoret & Expt Phys, Moscow 117259, Russia

[4] Kyoto Univ, Sakyo Ku, Kyoto 6068502, Japan

[5] RIKEN, Wako, Saitama 3510198, Japan

[6] SUNY Stony Brook, Stony Brook, NY 11794 USA

[7] Univ Wisconsin, Madison, WI 53706 USA

[8] Yale Univ, New Haven, CT 06520 USA

来源：

PHYSICS LETTERS B | 2006年 / 638卷 / 5-6期

基金：

美国国家科学基金会;

关键词：

elastic scattering; spin; coulomb nuclear interference; hadronic spin-flip;

D O I：

10.1016/j.physletb.2006.06.008

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A precise measurement of the analyzing power A(N) in proton-proton elastic scattering in the region of 4-momentum transfer squared 0.001 < vertical bar t vertical bar < 0.032 (GeV/c)(2) has been performed using a polarized atomic hydrogen gas jet target and the 100 GeV/c RHIC proton beam. The interference of the electromagnetic spin-flip amplitude with a hadronic spin-nonflip amplitude is predicted to generate a significant A(N) of 4-5%, peaking at -t similar or equal to 0.003 (GeV/c)(2). This kinematic region is known as the Coulomb nuclear interference region. A possible hadronic spin-flip amplitude modifies this calculable prediction. We present the first precise result of the CNI asymmetry and shape as a function of t. Our data are well described by the CNI prediction with the electromagnetic spin-flip alone and do not support the presence of a large hadronic spin-flip amplitude. (c) 2006 Elsevier B.V. All rights reserved.

引用

页码：450 / 454

页数：5

共 17 条

[1] FURTHER RESULTS FROM CHARGE-EXCHANGE PHOTOPRODUCTION [J].

CONDO, GT ;

HANDLER, T ;

BUGG, WM ;

BLACKETT, GR ;

PISHARODY, M ;

DANYO, KA .

PHYSICAL REVIEW D, 1993, 48 (07) :3045-3047

[2] Polarized proton collider at RHIC [J].

Alekseev, I ;

Allgower, C ;

Bai, M ;

Batygin, Y ;

Bozano, L ;

Brown, K ;

Bunce, G ;

Cameron, P ;

Courant, E ;

Erin, S ;

Escallier, J ;

Fischer, W ;

Gupta, R ;

Hatanaka, K ;

Huang, H ;

Imai, K ;

Ishihara, M ;

Jain, A ;

Lehrach, A ;

Kanavets, V ;

Katayama, T ;

Kawaguchi, T ;

Kelly, E ;

Kurita, K ;

Lee, SY ;

Luccio, A ;

MacKay, WW ;

Mahler, G ;

Makdisi, Y ;

Mariam, F ;

McGahern, W ;

Morgan, G ;

Muratore, J ;

Okamura, M ;

Peggs, S ;

Pilat, F ;

Ptitsin, V ;

Ratner, L ;

Roser, T ;

Saito, N ;

Satoh, H ;

Shatunov, Y ;

Spinka, H ;

Syphers, M ;

Tepikian, S ;

Tominaka, T ;

Tsoupas, N ;

Underwood, D ;

Vasiliev, A ;

Wanderer, P .

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2003, 499 (2-3) :392-414

[3] SMALL-ANGLE POLARIZATION IN HIGH-ENERGY P-P SCATTERING THROUGH NONPERTURBATIVE CHIRAL-SYMMETRY BREAKING [J].

ANSELMINO, M ;

FORTE, S .

PHYSICAL REVIEW LETTERS, 1993, 71 (02) :223-226

[4]

BERGER MJ, NIST DATABASE

[5] HIGH-ENERGY PPBAR AND PP FORWARD ELASTIC-SCATTERING AND TOTAL CROSS-SECTIONS [J].

BLOCK, MM ;

CAHN, RN .

REVIEWS OF MODERN PHYSICS, 1985, 57 (02) :563-598

[6] NEW IMPACT PICTURE FOR LOW-ENERGY AND HIGH-ENERGY PROTON-PROTON ELASTIC-SCATTERING [J].

BOURRELY, C ;

SOFFER, J ;

WU, TT .

PHYSICAL REVIEW D, 1979, 19 (11) :3249-3260

[7] First measurement of AN at √s=200 GeV in polarized proton-proton elastic scattering at RHIC [J].

Bültmann, S ;

Chiang, IH ;

Chrien, RE ;

Drees, A ;

Gill, RL ;

Guryn, W ;

Landgraf, J ;

Ljubicic, TA ;

Lynn, D ;

Pearson, C ;

Pile, P ;

Rusek, A ;

Sakitt, M ;

Tepikian, S ;

Yip, K ;

Chwastowski, J ;

Pawlik, B ;

Haguenauer, M ;

Bogdanov, AA ;

Nurushev, SB ;

Runtzo, MF ;

Strikhanov, MN ;

Alekseev, IG ;

Kanavets, VP ;

Koroleva, LI ;

Morozov, BV ;

Svirida, DN ;

Khodinov, A ;

Rijssenbeek, M ;

Whitehead, L ;

Yeung, S ;

De, K ;

Guler, N ;

Li, J ;

Öztürk, N ;

Sandacz, A .

PHYSICS LETTERS B, 2006, 632 (2-3) :167-172

[8] SPIN-DEPENDENT PHENOMENA INDUCED BY ELECTROMAGNETIC-HADRONIC INTERFERENCE AT HIGH-ENERGIES [J].

BUTTIMORE, NH ;

GOTSMAN, E ;

LEADER, E .

PHYSICAL REVIEW D, 1978, 18 (03) :694-716

[9] Spin dependence of high energy proton scattering [J].

Buttimore, NH ;

Kopeliovich, BZ ;

Leader, E ;

Soffer, J ;

Trueman, TL .

PHYSICAL REVIEW D, 1999, 59 (11)

[10]

JINNOUCHI O, P 16 INT SPIN PHYS S, P515

← 1 2 →